Railway roller-bearing car-wheel



(N0 Modeli J. J. A. MILLER. RAILWAY ROLLER BEARING GAR WHEEL. No. 583,917.

Patented June 8, 1897.

:51 ZLL :11 ALL WU neoaeo i x V UNITED STATES PATiasrT Trice.

JOHN J. A.

MILLER, OF DENVER, COLORADO.

RAILWAY ROLLER-BEARING CAR=WHEEL.

SPECIFICATION forming part of Letters Patent No. 583,917, dated June 8, 1897.

Application filed January 18, 1897. Serial No. 619,601. (No model.)

T0 at 1071,0121, it may cancer-rt:

Be it known that 1, JOHN J. A. MILLER, a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Railway RollenBearing Car-\Vheels; and I do declare the following to be a full, clear, and exact de-' drawings and specification, in which- Figure 1 represents aside elevation in section through Fig. 2 of my improved car-wheel. Fig. 2 represents a sectional elevation of Fig. 1; Fig. 3, a side elevation of the roller-disk covering plate, and Fig. i a side elevation of the side plate of the tread and wheel.

Similar letters of reference refer to similar parts throughout the several views.

Referring to Fig. 1, A designates a fragment of an axle-shaft. This shaft may be either square or round and may be fixed in suitable supports or rotatable in boxes. The core of my improved wheel consists of a disk B, which I fit to this shaft with a key 0 or other suitable means. This disk has an integral side flange D, which is arranged even with one side of it and is of larger diameter. On the opposite side a plate E is secured by means of screws F. This arrangementforms a central tread portion G between the two flanges on the disk. The tread H of the wheel is provided with the usual flange I and with an integral side flange J on the side opposite this flange I, which extends to the axle and rests freely on it. Upon the cast face of the tread portion of the wheel I place a removable tire J, of stcel or other suitable metal, which is provided with depending lugs L. These lugs fit into notches M, cut in the cast treadportion, or I may fit a key N partially in the tire and partially in the tread portion. The flange side of the tread portion has a chamber cast into it, and around the periphery of this chamber I also removably secure a metal ring 0 in a manner similar to the tread-ring. The core-disk rests in the chamber, and upon its tread portion I also secure a ring 0, of steel orother suitable metal. Around the tread portion of the diskcore between its flanges I arrange a circle of rollers P, arranging them close enough to almost touch one another. Between each two of these rollers I place a third roller Q or a circle of rollers resting upon the rollers of the first circle. I preferably make the outer circle of rollers larger in diameter than the inner circle and make them of sizes that will just fill the space between the tread of the core-disk and the periphery of the chamber. To place the parts together, the core-disk should be first keyed to the axle and then the tread portion slipped on the shaft and over the disk. The side plate of the disk should be removed and the rollers inserted on the tread. The plate is then replaced. I then secure a plate R to the side of the tread portion of the wheel over the entrance to the chamber by screws S. These screws may be extended into the steel t-readring, as shown in Fig. 2, and secure it against lateral displacement from the tread portion of the wheel. hen the axle is stationary or fixed against rotation, the disk is also stationary and the tread portion rolls on the rollers on the core-disk; but if the axle is supported to rotate in suitable boxes the axle and disk will rotate and also the tread until a brake is applied to the tread, when it will slow down and stop if under weight and momentum, and the axle and disk will be free to rotate independent of it. Upon each side of the wheel I secure by screws '1 dust-guards U, which consist of pieces of leather or rubber arranged to bear on the axle. The several metal rings when worn too thin for safety, or when the space in which the rollers run becomes too large or the bearing too loose,

can be easily removed without replacing the entire Wheel. In Patent No. 577,519, issued to me December 1896, I illustrated and described certain features shown but not ery of said chamber and bear on the outer circle of rollers, substantially as described.

2. The combination of the axle, the disk, the rollers and the tread portion having a chamber in said tread portion and an inclependent removable metal ring on its tread portion, and on theperipheryof its chamber,

substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN J. A. MILLER.

\Vit-nesses:

JOHN VIDEEN, RICHARD W. TARRANT. 

